Locomotive stack



' Sept. 28, 1926.

C. F. STREET LOCOMOTIVE STACK Original Filed pril 1925 z. EN

Patented Sept. 28, 1926.

umran s'r'ras ace ate LOCOMOTIVE STACK.

Original application filed April 4, 1925, Serial No. 20,623. Divided and this application filed October 27,

1925. Serial No. 65,110.

expensive' construction, whereby the members of a multiple smoke stack, of the type set forth in said Letters Patent No. 1,239,370, may be accurately assembled, and securely maintained, in proper relation, and means for supporting a smoke stack, of such type,

in operative position, with the capacity of ready removal and replacement, when desired and without interfering with the location of adjacent members in the locomotlve smoke box.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawing: Flgure 1 is a vertical central section through a locomotive stack embodying my invention, l0- cated in operative position in connection with the smoke box of a locomotive boiler; Fig. 2, a plan or top view; Fig. 3, an enlarged sectional view, showing the connection of the head plates and channels; and, Fig, 4, a similar view, showing a structural modification thereof.

In the practice of my invention, referring descrip-tively to the specific embodiment thereof which is herein exemplified, the multiple smoke stack comprises a plurality of discharge channels, 1, which are disposed, in vertical planes, symmetrically about its axial line. The discharge channels, which are preferably wrought metal tubes, are assembled in proper relative positions, by being inserted, at their ends, in guiding lugs in an upper head plate, 2, and a lower head plate, 2*, said guiding lugs being formed at the inner ends of openings in the head plates, which openings are of the same diameter, inthe upper head plate, as that of the inside of the discharge channels, and are preferably, as shown, outwardly flared or tapered, in the lower head plate.

The completed stack is fitted in a concentric outer casing, 4, connected to the smoke box, 5, of the boiler, in line axially with the exhaust pipe, 6, the exhaust steam from which is discharged through a pluralityv of nozzles, corresponding in number and in relative axial relation with the discharge channels, 1. The upper head plate, 2, is made a neat fit in the casing, 4, thereby preventing the down rush of air into the smoke box, around the discharge channels, which would result from the vacuum in the smoke box. A circumferential flange, 2 is formed on. the upper head plate, said flange fitting on a corresponding flange, 4*, on the top of the casing, 4, and being secured thereto by bolts, 2. A firm support for the stack is thereby provided.

it is of importance, in operation, that each of the discharge channel openings of the lower head plate, 2?, shall be, at all times, directly in. line axially overv one of the exhaust pipe nozzles, 6 and that said openings and nozzles shall have fixed positions, relatively one to the other. To this end provision must be made for variations in workmanship, in fitting the parts, as well as for expansion and contraction under variations oi temperature, and this may be accomplished under my invention, by the construction herein exemplified, in which the upper and lower head plates are attached flexibly to the discharge channels, by shoulder bolts, 12, which are smaller in diameter than the holes through which they pass, as clearly shown in Figs. 3 and 4, said bolts being made tight by nuts, 13, hearing on the head plates, through interposed washers, 14. The bolts, 12, thereby connect the parts together, without rigidly clamping them. The lower head plate is connected to the exhaust pipe, by the bolts, 11, without capacity of movement about the axial line of the stack.

Instead of securing the bolts, 12, by nuts, cotter pins, 13 may be applied, as shown in Fig[ 4.

The exhaust pipe, 6, passes through the table plate, 8, connected to the diaphragm, 9, in the usual manner, and a sheet of netting, 10, extends upwardly and forwardly from the table plate to the wall of the smoke box. The discharge of steam from the exhaust pipe is efi'ected, through a plurality of nozzles, 6 formed integral with connecting ribs, 6 and bolted to the exhaust pipe, each of said nozzles standing in line axially with one of the discharge channels.

It will be seen that the stack is firmly supported, independently of a direct connection with the smoke box, and with the capacity of ready attachment and removal,

as desired, Without interference with the ready removal of the nozzles, and it is guided and maintained in line axially with the exhaust pipe, by a plurality of vertical bolts, 11, connected to the top of the exhaust pipe and passing freely through the lower head plate.

The structural features of my invention above described, enable the operative advantages of that of Patent No. 1,239,370 to be made eifectually available, with a minimum of cost of installation and of liability to breakage or derangement in operation.

I claim as my invention and desire to secure by Letters Patent:

1. In a multiple locomotive stack, the combination of a plurality of vertical discharge channels; and upper and lower head plates, flexibly connected to said discharge channels.

2.111 a multiple locomotive stack, the combination of a plurality of vertical discharge channels; upper and lower head plates, flexibly connected to said discharge channels, and a stack casing, supporting the upper head plate.

In a multiple locomotive stack, the

combination of a plurality of vertical discharge channels; upper and lower head plates flexibly connected to said discharge channels; an exhaust pipe; and guide bolts. tixed to said exhaust pipe and connected. with the capacity of relative movement, to the lower head plate.

1-. The combination ot a stack base, adapted tor connection to a locomotive smoke box: a plurality o'tverticaldischarge channels, disposed Within said base; and a head plate to which the upper ends of said discharge channels are connected and which closes the top of the stack base.

The combination of a stack base,adapt ed for connection to locomotive smoke hm; and having a circumferential. flange at its top; a plurality of vertical discharge channels disposed Within said stack base; a head plate to which the upper ends of said discharge channels are connectet, and which closes the top of the stack base; a circumferential flange on said head plate; and bolts connecting said flange to the [hinge of the stack base. 

